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    11.
    发明专利
    未知

    公开(公告)号：FI964190A

    公开(公告)日：1996-10-18

    申请号：FI964190

    申请日：1996-10-18

    Applicant: RHONE POULENC CHIMIE

    Inventor： METIVIER PASCAL ,  JOUVE ISABELLE ,  MALIVERNEY CHRISTIAN

    IPC: B01J27/053 ,  C07B61/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/575 ,  C07C47/58 ,  C07C51/15 ,  C07C51/353 ,  C07C51/367 ,  C07C51/373 ,  C07C65/21 ,  C07C

    Abstract: PCT No. PCT/FR96/00241 Sec. 371 Date Oct. 16, 1996 Sec. 102(e) Date Oct. 16, 1996 PCT Filed Feb. 14, 1996 PCT Pub. No. WO96/26175 PCT Pub. Date Aug. 29, 1996The subject of the present invention is a process for the preparation of a 4-hydroxybenzaldehyde carrying at least one substituent in the position ortho to the OH group. It more particularly relates to the preparation of 3-methoxy-4-hydroxybenzaldehyde and of 3-ethoxy-4-hydroxybenzaldehyde. The process for the preparation of a substituted 4-hydroxybenzaldlehyde, substituted at least in the 3 position by an alkoxy group, is characterized in that it comprises subjecting a substituted phenol compound, substituted at least in the 2 position by an alkoxy group and in which the 4 and 6 positions are free, to a first stage of carboxylation in the 6 position, then to a stage of hydroxymethylation in the 4 position, followed by a stage of oxidation of the hydroxymethyl group to a formyl group, and finally to a last decarboxylation stage.\!

    12.
    发明专利
    未知

    公开(公告)号：DE69731967D1

    公开(公告)日：2005-01-20

    申请号：DE69731967

    申请日：1997-10-13

    Applicant: RHONE POULENC CHIMIE

    Inventor： METIVIER PASCAL ,  MALIVERNEY CHRISTIAN ,  DENIS PHILIPPE

    IPC: B01J23/644 ,  C07B61/00 ,  C07C45/38 ,  C07C47/565 ,  C07C47/575 ,  C07C47/58 ,  C07C51/255 ,  C07C65/05

    Abstract: The present invention concerns a process for the preparation of a 2-hydroxybenzoic acid and of a 4-hydroxybenzaldehyde and derivatives thereof from a mixture of two phenolic compounds, one carrying a formyl or hydroxymethyl group in the 2 position, and the other carrying a formyl or hydroxymethyl group in the 4 position. The invention also concerns the preparation of a 4-hydroxybenzaldehyde from said mixture. The invention more particularly concerns the preparation of 3-methoxy-4-hydroxybenzaldehyde and of 3-ethoxy4-hydroxybenzaldehyde, respectively known as "vanillin" and ethylvanillin". The process for the preparation of a 2-hydroxybenzoic acid and a 4-hydroxybenzaldehyde and derivatives thereof is characterised in that the formyl or hydroxymethyl group in the 2 position of compound (A) in a mixture of phenolic compounds, one (A) carrying a formyl or hydroxymethyl group in the 2 position, and the other (B) carrying a formyl or hydroxymethyl group in the 4 position, is selectively oxidised to a carboxy group and optionally a hydroxymethyl group of compound (B) in the 4 position is selectively oxidised to a formyl group, thus producing a mixture of a 2-hydroxybenzoic acid and a 4-hydroxybenzaldehyde.

    13.
    发明专利
    未知

    公开(公告)号：DE69609806D1

    公开(公告)日：2000-09-21

    申请号：DE69609806

    申请日：1996-02-14

    Applicant: RHONE POULENC CHIMIE

    Inventor： METIVIER PASCAL ,  JOUVE ISABELLE ,  MALIVERNEY CHRISTIAN

    IPC: B01J27/053 ,  C07B61/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/575 ,  C07C47/58 ,  C07C51/15 ,  C07C51/353 ,  C07C51/367 ,  C07C51/373 ,  C07C65/21

    Abstract: PCT No. PCT/FR96/00241 Sec. 371 Date Oct. 16, 1996 Sec. 102(e) Date Oct. 16, 1996 PCT Filed Feb. 14, 1996 PCT Pub. No. WO96/26175 PCT Pub. Date Aug. 29, 1996The subject of the present invention is a process for the preparation of a 4-hydroxybenzaldehyde carrying at least one substituent in the position ortho to the OH group. It more particularly relates to the preparation of 3-methoxy-4-hydroxybenzaldehyde and of 3-ethoxy-4-hydroxybenzaldehyde. The process for the preparation of a substituted 4-hydroxybenzaldlehyde, substituted at least in the 3 position by an alkoxy group, is characterized in that it comprises subjecting a substituted phenol compound, substituted at least in the 2 position by an alkoxy group and in which the 4 and 6 positions are free, to a first stage of carboxylation in the 6 position, then to a stage of hydroxymethylation in the 4 position, followed by a stage of oxidation of the hydroxymethyl group to a formyl group, and finally to a last decarboxylation stage.\!

    Method for selective preparation of a 2-hydroxybenzoic acid and a 4-hydroxybenzaldehyde and derivatives
    15.
    发明专利
    Method for selective preparation of a 2-hydroxybenzoic acid and a 4-hydroxybenzaldehyde and derivatives 未知

    公开(公告)号：AU4709497A

    公开(公告)日：1998-05-11

    申请号：AU4709497

    申请日：1997-10-13

    Applicant: RHONE POULENC CHIMIE

    Inventor： METIVIER PASCAL ,  MALIVERNEY CHRISTIAN ,  DENIS PHILIPPE

    IPC: B01J23/644 ,  C07B61/00 ,  C07C45/38 ,  C07C47/565 ,  C07C47/575 ,  C07C47/58 ,  C07C51/255 ,  C07C65/05

    Abstract: The present invention concerns a process for the preparation of a 2-hydroxybenzoic acid and of a 4-hydroxybenzaldehyde and derivatives thereof from a mixture of two phenolic compounds, one carrying a formyl or hydroxymethyl group in the 2 position, and the other carrying a formyl or hydroxymethyl group in the 4 position. The invention also concerns the preparation of a 4-hydroxybenzaldehyde from said mixture. The invention more particularly concerns the preparation of 3-methoxy-4-hydroxybenzaldehyde and of 3-ethoxy4-hydroxybenzaldehyde, respectively known as "vanillin" and ethylvanillin". The process for the preparation of a 2-hydroxybenzoic acid and a 4-hydroxybenzaldehyde and derivatives thereof is characterised in that the formyl or hydroxymethyl group in the 2 position of compound (A) in a mixture of phenolic compounds, one (A) carrying a formyl or hydroxymethyl group in the 2 position, and the other (B) carrying a formyl or hydroxymethyl group in the 4 position, is selectively oxidised to a carboxy group and optionally a hydroxymethyl group of compound (B) in the 4 position is selectively oxidised to a formyl group, thus producing a mixture of a 2-hydroxybenzoic acid and a 4-hydroxybenzaldehyde.

    17.
    发明专利
    未知

    公开(公告)号：BR9605182A

    公开(公告)日：1997-10-14

    申请号：BR9605182

    申请日：1996-02-14

    Applicant: RHONE POULENC CHIMIE

    Inventor： METIVIER PASCAL ,  JOUVE ISABELLE ,  MALIVERNEY CHRISTIAN

    IPC: B01J27/053 ,  C07B61/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/575 ,  C07C47/58 ,  C07C51/15 ,  C07C51/353 ,  C07C51/367 ,  C07C51/373 ,  C07C65/21

    Abstract: PCT No. PCT/FR96/00241 Sec. 371 Date Oct. 16, 1996 Sec. 102(e) Date Oct. 16, 1996 PCT Filed Feb. 14, 1996 PCT Pub. No. WO96/26175 PCT Pub. Date Aug. 29, 1996The subject of the present invention is a process for the preparation of a 4-hydroxybenzaldehyde carrying at least one substituent in the position ortho to the OH group. It more particularly relates to the preparation of 3-methoxy-4-hydroxybenzaldehyde and of 3-ethoxy-4-hydroxybenzaldehyde. The process for the preparation of a substituted 4-hydroxybenzaldlehyde, substituted at least in the 3 position by an alkoxy group, is characterized in that it comprises subjecting a substituted phenol compound, substituted at least in the 2 position by an alkoxy group and in which the 4 and 6 positions are free, to a first stage of carboxylation in the 6 position, then to a stage of hydroxymethylation in the 4 position, followed by a stage of oxidation of the hydroxymethyl group to a formyl group, and finally to a last decarboxylation stage.\!

    Highly selective, hydroxylated aromatic cpd. ortho-alkylation
    19.
    发明专利
    Highly selective, hydroxylated aromatic cpd. ortho-alkylation 未知

    公开(公告)号：FR2738563A1

    公开(公告)日：1997-03-14

    申请号：FR9510647

    申请日：1995-09-12

    Applicant: RHONE POULENC CHIMIE

    Inventor： MALIVERNEY CHRISTIAN

    IPC: C07C37/00 ,  C07C41/18 ,  C07C213/02 ,  C07C39/08 ,  C07C43/23 ,  C07C217/58

    Abstract: A process for the ortho-alkylation of a hydroxylated aromatic cpd., in which at least one of the two positions ortho to the OH gp. is free is claimed. The cpd. is reacted with a carbonylated cpd. and a sec. amine, this leading to a hydroxylated aromatic cpd. with an ortho-aminomethyl gp. (opt. substd.) which is subjected to hydrogenolysis. Also claimed are: (i) the substd. cpds. obtd. of formula (IV) or (V); and (ii) a process for the prepn. of an ortho-alkylated di-hydroxylated aromatic cpd. with an OH and alkoxy gp.

    20.
    发明专利
    未知

    公开(公告)号：FR2730730A1

    公开(公告)日：1996-08-23

    申请号：FR9501926

    申请日：1995-02-20

    Applicant: RHONE POULENC CHIMIE

    Inventor： METIVIER PASCAL ,  MALIVERNEY CHRISTIAN ,  JOUVE ISABELLE

    IPC: B01J27/053 ,  C07B61/00 ,  C07C45/65 ,  C07C45/67 ,  C07C47/575 ,  C07C47/58 ,  C07C51/15 ,  C07C51/353 ,  C07C51/367 ,  C07C51/373 ,  C07C65/21

    Abstract: A method for preparing a 4-hydroxybenzaldehyde having at least one substituent in the ortho position of the OH group, is disclosed. In particular, the preparation of 3-methoxy-4-hydroxybenzaldehyde and 3-ethoxy-4-hydroxybenzaldehyde is disclosed. The method for preparing a 4-hydroxybenzaldehyde which is at least 3-substituted by an alkoxy group comprises a step wherein a phenol compound which is at least 2-substituted by an alkoxy group and has positions 4 and 6 free is carboxylated in position 6 then hydroxymethylated in position 4, followed by a step of oxidising the hydroxymethyl group to a formyl group, and finally a decarboxylation step.

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